add method to recover an item from changelog

pandora/changelog/recover.py

@@ -0,0 +1,92 @@
+import models
+import item.models
+import user.models
+import archive.models
+
+def recover_item(id):
+    if item.models.Item.objects.filter(itemId=id).exists():
+        raise Exception('id is taken')
+    qs = models.Changelog.objects.filter(value__contains='id": "%s"' % id)
+    if not qs.exists():
+        raise Exception('id not found')
+    old = qs.order_by('-created')[0]
+    i = item.models.Item()
+    i.itemId = id
+    i.data = old.value
+    created = old.value['created']
+    i.user = user.models.User.objects.get(username=i.data['user'])
+    for key in [
+         u'rendered',
+         u'random',
+         u'cuts',
+         u'duration',
+         u'id',  
+         u'size',
+         u'posterFrame',
+         u'parts',
+         u'cutsperminute',
+         u'hue', 
+         u'numberofcuts',
+         u'durations',
+         u'volume',
+         u'user',
+         u'words',
+         u'videoRatio',
+         u'aspectratio',
+         u'bitrate',
+         u'pixels',
+         u'created',
+         u'numberoffiles',
+         u'modified',
+         u'timesaccessed',
+         u'accessed',
+         u'resolution',
+         u'wordsperminute',
+         u'posterRatio'
+    ]:
+        if key in i.data:
+            del i.data[key]
+    i.save()
+    i.itemId = id
+    i.created = created
+    i.save()
+    i.update_sort()
+    i.update_find()
+    print 'created', i, i.id
+
+    for a in models.Changelog.objects.filter(value__contains='id": "%s/' % id).order_by('created'):
+        qs = i.annotations.filter(public_id=a.value['id'])
+        if qs.exists():
+            annot = qs[0]
+        else:
+            annot = item.models.Annotation()
+            annot.item = i
+            annot.public_id = a.value['id']
+        annot.created = a.value['created']
+        annot.modified = a.value['modified']
+        annot.user = user.models.User.objects.get(username=a.value['user'])
+        annot.start = a.value['in']
+        annot.end = a.value['out']
+        annot.value = a.value['value']
+        annot.layer = a.value.get('layer', 'transcripts')
+        annot.save()
+    return i
+
+def recover_file(id, oshash, filename):
+    i = item.models.Item.objects.get(itemId=id)
+    file, created = archive.models.File.objects.get_or_create(oshash=oshash)
+    if created:
+        file.item = i
+        file.path = filename
+        file.wanted = True
+        file.selected = True
+        extension = file.path.split('.')
+        if len(extension) > 1:
+            extension = extension[-1]
+        else:
+            extension = 'webm'
+        file.info['extension'] = extension.lower()
+        file.save()
+    else:
+        raise Exception('file exists', oshash)
+    return file